1381249 has 8 divisors (see below), whose sum is σ = 1441440. Its totient is φ = 1322400.

The previous prime is 1381231. The next prime is 1381271. The reversal of 1381249 is 9421831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1381249 - 2⁵ = 1381217 is a prime.

It is a Duffinian number.

1381249 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1381229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2134 + ... + 2704.

It is an arithmetic number, because the mean of its divisors is an integer number (180180).

2^1381249 is an apocalyptic number.

It is an amenable number.

1381249 is a deficient number, since it is larger than the sum of its proper divisors (60191).

1381249 is an equidigital number, since it uses as much as digits as its factorization.

1381249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671.

The product of its digits is 1728, while the sum is 28.

The square root of 1381249 is about 1175.2655019186. The cubic root of 1381249 is about 111.3672063576.

It can be divided in two parts, 13812 and 49, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 1381249 in words is "one million, three hundred eighty-one thousand, two hundred forty-nine".